compound (stem):
a stem formed by combining two (or more) stems (or
roots).
For example, "blackboard" is a compound stem,
built from the stems (roots)
"black"
and "board".
A stem
with only one root plus one or more affixes is not considered a compound,
though it is
complex [2].
Compound stems are nearly always
derivational.
[Spanish:
compuesto]